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@eine faire @anni @ffm- Leiters Patent No. 474,051, dated February 4, 1868.

inrnovenenr In HEATING-reassess.

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TO ALL WIIOM IT MAY CONCERN:

Be it known that I, NATHANIEL E. GonNwALL, of the city of New- York, and State of New York, have invented a new and useful Machine for Increasing andA Distributing the Heat of Stoves and Furnaces; and I do hereby declare that the'following is a full, clear, and exact descriptionpof the construction and operation of the same, reference being had to the annexed drawings, making a part of this specification, in which-f l i Figure 1 is a perspective View of the interior of a heating-furnace, the front :view being an elevation presented by a vertical section-near the front of the furnace, and the perspective at the top showing a transverse section near the top of the furnace. In this figure, F and-Fare two radiators, so placed that they may be used together or separately to distribute the heat frpm one fire-pot of a hot-air furnace or heater. Thevbase, a; of each radiator is set upon the {ire-pot of a stove or furnace, or connected withthe tire-pot or other healr2-generator by a shallow chamber, ci, and a lshort pipe or pipes. Upon the base, gz, are settse'veral pipes, ecco, which` are crescent-shaped in their orifices, and vary in number and capacity according to the size and capacity of the tire-pot, and form channels-'for the passage of the heat, together with the smoke and gas, to the chamber b, from which an orifice at e., or any other convenient point, aiords the outlet by a ue-pipe to the chimney. In this figure o and .o showA the position in each radiator-cfa crescentcheck damper,.which is placed upon the hase'of the chamber I, and,`v when closed, nearly covers -the orifices of all the pipes, but leaves in each a suiicient passage for a portion ofthe beat te the chamber b, and also for any residuum of suipke or 'gas which may need to escapeby *the'u-pipe and chimney. vIn thi`s"fi'g`ure,`p 'cndp show the position in veach radiator of 'a crescentclose damper,.whichris` placed under'the baseya, and when closed, entirely covers the orifices-ofthe pipes ofthe radiator. 7c ck show three sides of the wall or caseof the hot-air chamber, which is divided into separate compartments by a partition of non-conductingmaterial, indicated by the dotted lines gg; and :c a: isa tire-pot, so

constructed, or graduated with a movable partition,seen at n, and a self-adjusting grate in each part, as to afford heat for one radiator or more; the smoke-pipes from e, or any other point in the chamber b, of each radiator, passing through the wall or case of the hot-air chamber at z z, or vany other. convenient points. Pipes for conveying' the heated air to distributing-registers are attached to the hot-air chamber at vv, or any other points, and separate cold-air pipes for each compartment of the hot-air ,chamber introduced at convenient points in the front part of the wall or case, so asl to convey heat to a part of the house, or the whole, at pleasure, and secure the passage of heat to everysystem of registers. The stops'in these cold-air pipes may also be respectively connected with the close 'dampersp and p, at the base of each radiator, so that when the damper at the base of either radiator is closed, and that radiator not heatedthe cold air will be shut oli` from' that compartment and its registers.

`Figure 2 representsy the crescent-check damper, which -nearly covers the orifices of all the pipes of the radiator at the top. In this figure, the converging lines at c c c c indicate those parts of theorices ofthe pipes oi' the radiator which are not covered by the cheek-damper, and the dotted circle the outline of the base of the chamber tig. 1.

Figure 3 represents the crescent-close damper, which entirely closes the orifices ofthe pipes of-th'e radiator at the base.` The dotted circle in this figure indicatesthe outline of the base of the radiator.

By removing the movable partition of the tire-pot, and closing the damper at the base of one radiator, nearly the whole of the heat generated over both grates ot' the ltire-pot may be conveyed to a. single compartment of the hot-air chamber, and thus to a single system of registers for a part of the house; or, by means of a door in the partit-ion of the hot-air chamber, the heat from the/tire of a single grate `ino'ne part of the repot may be conveyed to'both compartments of the hot-air chamber, `and made to supply both systems et? registers.4 By this arrangement a great variation may be made in the amount of heat abrded by the furnace, according to the temperature of the season and the wants' of each part of the'house.

A single radiator, placed over the irepot of any stove, or connected with it by :a pipe or pipes,- and enclosed in a suitable hot-air case, to which a hot-air pipe and registers may be attached, forms a small `heatimfg-furnace for one or'more rooms.

'The radiator, herein described, is made o f sheet iron, cast iron, or any other Iuaterialof which stoves and furnaces may be made, and operates by presenting the largest'radiating-surface that con be obtained ar-ound given space for the passage of the heat generated. It thus brings the largest amount of the heat from any given tire most directly to tbe radiating-surface, `and most et'fectually increases and distributes the heat generated by any given amount of fuel. Y y

A practical test of the radiator as an apparatus for the rapid increase, radiation, transmission, and distribution of heat, and-for conducting lamc and smoke and any residuum of uneonsumed gas from the fire-pot to the due-pipe to which the radiator is adapted, has been made by the inventor in various ways with perfect sueccss.-

What I claim as my invention, and desire-to secure by Letters Patent, is-

1. The radiator, consisting of tbe base, a, with pipes c c c c, and the chamber b, or chambers b andd, substantiaily'as described'and for the purposes set forth.

2. The crescent-check damper, andthe crescent-close damper, constructed substantially as described, and arranged so as to operate in the manner and for the purpses shown.,

3. The fire-pot, constructed in two parts, substantially as described, and so arranged with separate Iradiators in separate compartments of the hot-air chamber of a furnace, and separate systems of hot-air pipes and distributing-registers, as to convey' all the heat from both parts of the rerpot to one system of registers, or to distribute the heat from one part of the fire-pot to every system of registers, at pleasure.

N.- E. CORNWALL.

Witnesses:

JOHN HOPKINS, JER. Lenen. 

